Great images can do a lot for your blog posts. They get attention when people get to your site and they really help your content do well in social media (because of the combination of great headline and great visuals). Stock photos can start to add up though, especially in larger sizes!
I’ve collected a set of free stock photo resources for you. Always double-check the licenses before you use a picture but this can save you a lot of time and money and also give your blog posts a unique look.